Monterey Update iMac19,1: MISSION: IMPOSSIBLE

Hi everyone!

I've been trying for days to install Monterey on my 2019 iMac 5K. The SSD is the original. 500Gb. I had BigSur and had the unfortunate idea to do a clean Monterey install. Now, I can't install anything higher than Mojave (10.14.6). I have tried to do it in safe mode, in recovery mode, in recovery mode with the latest version available (Monterey) with no result. I even went into diagnostic mode and my hardware has no RAM or SSD problems. I copy the moment when the installer stops abruptly.

Nov 20 13:25:00 iMac osinstallersetupd[1727]: Finished extracting: succeeded

Nov 20 13:25:00 iMac osinstallersetupd[1727]: Syncing extracted data to disk

Nov 20 13:25:00 iMac osinstallersetupd[1727]: Could not verify trust (5) using MobileSoftwareUpdate policy. Will try basic X509.

Nov 20 13:25:10 iMac osinstallersetupd[1727]: **** /macOS Install Data/UpdateBundle/AssetData/./payloadv2/payload.009 != ./payloadv2/payload.009 ****

Nov 20 13:25:10 iMac osinstallersetupd[1727]: Operation queue failed with error: Error Domain=com.apple.OSInstallerSetup.error Code=1004 "An error occurred loading the update." UserInfo={NSLocalizedDescription=An error occurred loading the update.}

Nov 20 13:25:10 iMac InstallAssistant[1724]: Stopped operation queue with Error Domain=com.apple.OSInstallerSetup.error Code=1004 "An error occurred loading the update." UserInfo={NSLocalizedDescription=An error occurred loading the update.}